Crate epd_waveshare

A simple Driver for the Waveshare E-Ink Displays via SPI

This driver was built using embedded-hal traits.

Requirements

SPI

• MISO is not connected/available
• SPI_MODE_0 is used (CPHL = 0, CPOL = 0)
• 8 bits per word, MSB first
• Max. Speed tested by myself was 8Mhz but more should be possible (Ben Krasnow used 18Mhz with his implemenation)

Other....

• Buffersize: Wherever a buffer is used it always needs to be of the size: width / 8 * length, where width and length being either the full e-ink size or the partial update window size

Examples

use epd_waveshare::{
    epd2in9::{EPD2in9, Display2in9},
    graphics::{Display, DisplayRotation},
    prelude::*,
};
use embedded_graphics::Drawing;

// Setup EPD
let mut epd = EPD2in9::new(&mut spi, cs_pin, busy_in, dc, rst, &mut delay).unwrap();

// Use display graphics
let mut display = Display2in9::default();

// Write some hello world in the screenbuffer
display.draw(
    Font6x8::render_str("Hello World!")
        .with_stroke(Some(Color::Black))
        .with_fill(Some(Color::White))
        .translate(Coord::new(5, 50))
        .into_iter(),
);

// Display updated frame
epd.update_frame(&mut spi, &display.buffer()).unwrap();
epd.display_frame(&mut spi).expect("display frame new graphics");

// Set the EPD to sleep
epd.sleep(&mut spi).expect("sleep");

Modules

color	B/W Color for EPDs
epd1in54	A simple Driver for the Waveshare 1.54" E-Ink Display via SPI
epd2in9	A simple Driver for the Waveshare 2.9" E-Ink Display via SPI
epd4in2	A simple Driver for the Waveshare 4.2" E-Ink Display via SPI
graphics	Graphics Support for EPDs
prelude

Constants

SPI_MODE

SPI mode - For more infos see Requirements: SPI